const fs = require('fs')

//创建一个可读流
let readerStream = fs.createReadStream('input.txt')
//创建一个可写流
let writerStream = fs.createWriteStream('output.txt')

//管道读写操作
//读取input.txt 文件内容，并将内容写入到output.txt文件中
readerStream.pipe(writerStream)

console.log(`程序执行完毕`)